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Periodic Videos (also known as The Periodic Table of Videos) is a video project and YouTube channel on chemistry. It consists of a series of videos about chemical elements and the periodic table , with additional videos on other topics in chemistry and related fields.
Elements are placed in the periodic table according to their electron configurations, [38] the periodic recurrences of which explain the trends in properties across the periodic table. [39] An electron can be thought of as inhabiting an atomic orbital, which characterizes the probability it can be found in any particular region around the atom.
Dmitri Mendeleev, Russian chemist who proposed the periodic table: f-block groups 7 f-block [258] (10.3) (1100) – – 1.3 – synthetic unknown phase 102 No Nobelium: Alfred Nobel, Swedish chemist and engineer f-block groups 7 f-block [259] (9.9) (1100) – – 1.3 – synthetic unknown phase 103 Lr Lawrencium: Ernest Lawrence, American ...
Sir Martyn Poliakoff (born 16 December 1947) [3] is a British chemist known for his work on green chemistry and for being the main presenter on the popular YouTube channel Periodic Videos. [6] The core subjects of his academic work are supercritical fluids , [ 7 ] [ 8 ] infrared spectroscopy and lasers .
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The periodic table ignores them and follows idealised configurations. [9] They occur as the result of interelectronic repulsion effects; [7] [8] when atoms are positively ionised, most of the anomalies vanish. [7] The above exceptions are predicted to be the only ones until element 120, where the 8s shell is completed.
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A period 5 element is one of the chemical elements in the fifth row (or period) of the periodic table of the chemical elements.The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behaviour of the elements as their atomic number increases: a new row is begun when chemical behaviour begins to repeat, meaning that elements with similar behaviour fall ...